PRODUCT GRADING (Grade B) - Good Condition > Very light scratches and light signs of use > Refurbished to the highest standards. Retail Box WHAT IS IN THE BOX Elecom Wired / Wireless / Bluetooth Thumb-operated Trackball Mouse, 8-Button Function with Smooth Tracking, Precision Optical Gaming Sensor PRODUCT DESCRIPTION The ELECOM \"EX-G PRO\" trackball provides precise cursor movement for superior accuracy so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. Wired / wireless / bluetooth connectivities are available. OPTICAL TRACKING TECHNOLOGY The ELECOM \"EX-G PRO\" trackball provides precise cursor movement for superior accuracy so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. Wired / wireless / bluetooth connectivities are available. DPI CURSOR Designed with a high-performance gaming optics system sensor and lens. The DPI button can easily change between 500(LOW), 1000(MID) and 1500(HIGH) DPI, making the movements of your cursor faster or slower. EASY MAINTENANCE The ball rolls on three 2.5 mm large artificial ruby ball bearings. They are extremely smooth and the relatively large size prevents dust and dirt from clogging them. So you don’t have to clean the ball bearings too often. The ball is held in place by the ball bearings, but can easily be popped out of the device, by pushing it through the hole in the bottom and it can be easily cleaned. PRODUCT INFORMATION Connectivity technology - Bluetooth Recommended uses for product - Gaming Brand - Elecom Model name - EX-G PRO Special feature - 8 included wheel button